X = √63
A squared plus B squared equals C squared. It is the Pythagorean theorem.To do this you would find the two short sides of a right triangle. Then for one short side find the length and multiply it by itself and for the other short side do the same thing. After that add those two up and and find the square root of it. That number you have there is C aka hypotenuse aka the long side. :)
Since a squared plus b squared equals c squared, that is the same as c equals the square root of a squared plus b squared. This can be taken into squaring and square roots to infinity and still equal c, as long as there is the same number of squaring and square roots in the problem. Since this question asks for a and b squared three times, and also three square roots of a and b both, they equal c. Basically, they cancel each other out.
It has no solutions because the discriminant is less than zero.
The solutions are: x = 4, y = 2 and x = -4, y = -2
No. It's a quadratic equation, and it has two solutions.
These are two expressions, not equations. Expressions do not have solutions, only equations do. NB equations include the equals sign.
If: 2x+y = 5 and x2-y2 = 3 Then the solutions work out as: (2, 1) and ( 14/3, -13/3)
-x2+2.5x+1=0 x=-0.350781 x=2.85078
It is a quadratic equation and its solutions are: x = 4 or x = -9
1, that works, right?